package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotion.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.Assert;

import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 分类分页查询
     *
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.page(categoryPageQueryDTO);
        Long total = page.getTotal();
        List<Category> records = page.getResult();
        return new PageResult(total, records);
    }

    /**
     * 新增分类
     *
     * @param categoryDTO
     */
    @Override
    public void add(CategoryDTO categoryDTO) {
        Assert.notNull(categoryDTO.getType(), "类型不能为空");
        Assert.notNull(categoryDTO.getName(), "名称不能为空");
        Assert.notNull(categoryDTO.getSort(), "排序不能为空");
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        categoryMapper.insert(category);

    }

    /**
     * 根据分类类型查询
     *
     * @param type
     * @return
     */
    @Override
    public List<Category> list(Integer type) {
     List<Category> list = categoryMapper.list(type);
     return list;
    }

    /**
     * 分类信息修改
     *
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Assert.notNull(categoryDTO.getId(), "id不能为空");
        Assert.notNull(categoryDTO.getName(), "名称不能为空");
        Assert.notNull(categoryDTO.getSort(), "排序不能为空");
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        categoryMapper.update(category);
    }

    /**
     * 分类状态修改
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Assert.notNull(id, "id不能为空");
        Assert.notNull(status, "状态不能为空");
       Category category = categoryMapper.getById(id);
       category.setStatus(status);
       categoryMapper.update(category);
    }

    /**
     * 删除分类
     *
     * @param id
     */
    @Override
    public void delete(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.delete(id);
    }
}
